The Fell In Love With A Boy singer will play Anne of Cleves, the fourth wife of Henry VIII – who will be played by Jonathan Rhys Meyers.

Anne was only married to King Henry for about six months after she didn’t live up to his expectations in the looks department.

Anne, the daughter of a German nobleman, was betrothed to the English monarch in a marriage treaty between the Cleves Court and the king’s chancellor after Henry was shown a portrait of her.

But when Anne arrived in England Henry was disappointed with her appearance. He referred to her as the “Flanders mare” and annulled the marriage in July 1540 after six months.

The latest season of The Tudors will follow the king as he weds Jane Seymour – played by Anita Briem – and then Anne of Cleves.

The costume drama made headlines with its first series for its explicit sex scenes, though it was panned by critics for containing little else in the way of substance.

Joss, 21, became a singing sensation aged just 15 but since moving to America has been looking to move into acting. She appeared in the fantasy film Eragon in 2006, playing a witch, and recently starred in the Cadbury’s Flake adverts.